Mozart’s “School for Lovers” (to cite the opera’s alternate title) is set in Naples—in its heyday one of the supreme music capitals of Europe, and also the birthplace of Riccardo Muti, whose understanding of this most patrician yet most ironic of scores is unsurpassed. So, it was quite the occasion last season when Muti went home to conduct this new production at the breathtaking Teatro di San Carlo in the shadow of Vesuvius. Chiara Muti, the maestro’s daughter, staged the show, consolidating her reputation as a director of rare and unpretentious grace. It was only a matter of time before this Così would transfer to Vienna, where the opera premiered 230 years ago and Muti walks on water. —M.G.